when I see the word function or someone uses parenthesis to call one, it clearly is fp. Management was clear that this would not be tolerated, this source is too addictet to the good pure shit.

I wrote my own Lisp-like language that's a LLVM front end that explicitly uses greater-than / less-than angle brackets instead of parentheses for exactly this reason. When you walk by and don't look closely at it, it sort of looks like HTML so doesn't attract attention. And when a co-worker looked closer I just said it was a legacy templating engine and they really should just stick to python.